Enhancing ionic conductivity in lithium amide for improved energy storage materials

DOI: 10.1088/2043-6262/6/1/015005

Authors: Paul Anderson (University of Birmingham) , D Hewitt (University of Birmingham) , Rosalind Davies (University of Birmingham)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Advances In Natural Sciences: Nanoscience And Nanotechnology , VOL 6 (1)

State: Published (Approved)
Published: January 2015
Diamond Proposal Number(s): 3909

Abstract: Non-stoichiometry and bulk cation transport have been identified as key factors in the release and uptake of hydrogen in the Li–N–H system. Amide halide phases have been synthesized that have ionic conductivities several orders of magnitude greater than lithium amide, a faster rate of hydrogen release and elimination of the by-product, ammonia. Here we report the effect of both anion- and cation-doping on the hydrogen desorption properties of lithium amide, focusing in particular on how the presence of chloride anions and magnesium cations affects and controls the structure of the amide and imide compounds at the sub-nanometre level. Reducing the chloride content resulted in new low-chloride rhombohedral phases that contain around half of the chloride present in earlier amide chlorides, but maintained the enhancements seen in hydrogen desorption properties when compared to the halide-free system. These materials may also have potential in a range of other energy applications such as all solid state lithium ion batteries, supercapacitors, and CO2 capture and storage membranes.

Subject Areas: Chemistry, Materials, Energy


Instruments: I11-High Resolution Powder Diffraction

Added On: 02/02/2015 10:08

Documents:
Davies_2015_Adv._Nat._Sci%3A_Nanosci._Nanotechnol._6_015005.pdf

Discipline Tags:

Energy Storage Earth Sciences & Environment Sustainable Energy Systems Energy Climate Change Physical Chemistry Energy Materials Chemistry Materials Science

Technical Tags:

Diffraction X-ray Powder Diffraction